Product Safety Assessment Nitric Acid - The Dow Chemical Company

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Product Safety Assessment: Nitric Acid bioconcentration potential of nitric acid is low and its potential for mobility in soil is very high. Nitric acid will not biodegrade readily in the environment, but will ionize in water and be readily neutralized by the natural buffering capacity (alkalinity) present in the soil and surface water. The nitrate ion will ultimately become an inorganic nutrient for plant species. For more information, see the Safety Data Sheet. Back to top Physical Hazard Information 17 Nitric acid is a strong oxidizer, even when fairly dilute and at ambient temperatures. It can react explosively on contact with powerful reducing agents. While nitric acid is noncombustible, it increases the flammability of organic and readily oxidizable materials in fire situations. Nitric acid also reacts with many metals to form explosive hydrogen gas. Nitric acid reacts explosively with all metallic powders, carbides, hydrogen sulfide, and turpentine or other organics. Nitric acid reacts violently with many common organic solvents and chemicals, such as ethanol, turpentine, bases, most metals, and many other materials. The reactions with organics frequently result in the formation of gas which produces additional hazards in closed systems. Contact with combustible materials such as wood chips, sawdust, cellulose and polymeric absorbents can cause a fire. Water added to nitric acid will generate heat, fumes, and splattering. If it is necessary to mix with water, nitric acid should be added slowly while stirring. Store in a location where potential spills can be contained and in a location away from combustible or incompatible materials. For more information, see the Safety Data Sheet. Back to top Regulatory Information Regulations may exist that govern the manufacture, sale, transportation, use and/or disposal of nitric acid. These regulations may vary by city, state, country or geographic region. Information may be found by consulting the relevant Safety Data Sheet or Contact Us. Back to top Additional Information • Safety Data Sheet (http://www.dow.com/webapps/msds/msdssearch.aspx) • World Health Organization (WHO) Chemical Cards, International Program on Chemical Safety (IPCS) – Nitric acid, search CAS=7697-37-2 (http://www.ilo.org/public/english/protection/safework/cis/products/icsc/dtasht/_icsc01/icsc018 3.htm) • European Chemical Substances Information System (ESIS) for CAS=7697-37-2, and IUCLID Chemical Data Sheet (containing specific study data) (http://ecb.jrc.it/esis/) • WWW Scorecard Nitric acid Information – Nitric acid, search CAS=7697-37-2 (http://www.scorecard.org/chemical-profiles/summary.tcl?edf_substance_id=7697-37-2) • NIOSH Pocket Guide to Chemical Hazards – Nitric acid, search CAS=7697-37-2 (http://www.cdc.gov/niosh/npg/npgd0447.html) • CalEPA Air Resources Board Toxic Air Contaminant Summary, Nitric Acid Chemical Profile (http://www.scorecard.org/chemical-profiles/html/nitric_acid.html) Created: June 2, 2008 The Dow Chemical Company Page 4 of 6
Product Safety Assessment: Nitric Acid • EPA AEGLS for Nitric Acid (http://www.epa.gov/oppt/aegl/pubs/tsd310.pdf) • OSHA Chemical Sampling Information, for Nitric Acid (http://www.osha.gov/dts/chemicalsampling/data/CH_256600.html) • NIOSH Criteria Document for Nitric Acid entitled, “Criteria for a recommended standard… Occupational Exposure to Nitric Acid,” National Institute for Occupational Safety and Health (NIOSH), HEW Publication No. (NIOSH) 76-141 GPO NO. 017-033-00169-3, U.S. Government Printing Office, Washington, D.C., March 1976 • Occupational Health Guideline for Nitric Acid, U.S. Department of Labor Occupational Safety and Health Administration (OSHA), September, 1978 • American Conference of Governmental Industrial Hygienists, “Nitric Acid”, Documentation of the Threshold Limit Values for Substances in Workroom Air (6 th edition), Cincinnati • OSHA/EPA Occupational Chemical Database Website, Nitric acid, search CAS=7697-37-2 (US OSHA and EPA database of information on more than 800 chemicals commonly found in the workplace (http://www.osha.gov/web/dep/chemicaldata/#target) • Hazardous Substances Data Bank by the National Library of Medicine, Nitric acid, search CAS=7697-37-2 (http://toxnet.nlm.nih.gov/) For more business information about nitric acid, visit the ANGUS web site: www.dow.com/angus. Back to top References 1 American Conference of Governmental Industrial Hygienists (ACGIH), “Nitric Acid,” Documentation of the Threshold Limit Values for Substances in Workroom Air (6 th ed.), Cincinnati, 2001, pages 1-2. 2 Nitric Acid Material Safety Data Sheet, ANGUS Chemical Company, Identification Number: 62496 / 1031, January 28, 2008, pages 1-2. 3 National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances (NAC/AEGL Committee), “Acute Exposure Guideline Levels (AEGLs) for Nitric Acid (CAS Reg. No. 7697-37-2) – Interim 1,” October 2006, page 6. 4 Nitric Acid Material Safety Data Sheet, ANGUS Chemical Company, Identification Number: 62496 / 1031, January 28, 2008, page 5. 5 Dow/ANGUS website: About Us (http://www.dow.com/angus/about/) 6 CEH Marketing Research Report: Nitric Acid, Chemical Economics Handbook, SRI Consulting, September 2007, Abstract. 7 Chemical Thesaurus Reaction Chemical Database: Ostwald Process for the Manufacture of Nitric Acid, (http://www.chemthes.com/rxn_dp.php?id=2335). 8 ACGIH, “Nitric Acid,” Documentation of the Threshold Limit Values for Substances in Workroom Air (6 th ed.), Cincinnati, 2001, page 1. 9 ACGIH, “Nitric Acid,” Documentation of the Threshold Limit Values for Substances in Workroom Air (6 th ed.), Cincinnati, 2001, page 1. 10 ACGIH, “Nitric Acid,” Documentation of the Threshold Limit Values for Substances in Workroom Air (6 th ed.), Cincinnati, 2001, page 1. 11 CEH Marketing Research Report: Nitric Acid, Chemical Economics Handbook, SRI Consulting, September 2007, page 7. 12 Nitric Acid Material Safety Data Sheet, ANGUS Chemical Company, Identification Number: 62496 / 1031, January 28, 2008, pages 3-5. 13 Nitric Acid Material Safety Data Sheet, ANGUS Chemical Company, Identification Number: 62496 / 1031, January 28, 2008, pages 3-5. 14 ACGIH, “Nitric Acid,” Documentation of the Threshold Limit Values for Substances in Workroom Air (6 th ed.), Cincinnati, 2001, page 1. Created: June 2, 2008 The Dow Chemical Company Page 5 of 6
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